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(11) | EP 1 233 401 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Liquid crystal projector apparatus and driving method for liquid crystal projector apparatus |
| (57) The present invention provides a liquid crystal projector apparatus and a driving
method for a liquid crystal projector apparatus, which can display an image with an
optimum picture quality free from an influence of a temperature variation of a liquid
crystal panel without the necessity to directly measure the temperature of the liquid
crystal panel. The liquid crystal projector apparatus includes a temperature sensor
for detecting a temperature at a location in the liquid crystal projector apparatus
except liquid crystal panels, a memory for storing temperature detection data obtained
by the temperature sensor within a period from a power supply starting time to a steady
operation entering time of the liquid crystal projector apparatus, arithmetic operation
means for estimating a temperature of each of the liquid crystal panels based on the
temperature detection data stored in the memory to indirectly obtain the temperatures
of the liquid crystal panels, and liquid crystal drive sections for correcting drive
voltages for driving the liquid crystal panels with output signals of the arithmetic
operation means and applying the corrected drive voltages to the liquid crystal panels.
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